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BS 143:1952

Malleable cast iron and cast copper alloy for steam, air, water, gas and oil screwed b.s.p. taper thread or API line pipe thread
standard by BSI Group, 07/31/1963

BS 142-1-1.2:1982

Electrical protection relays. Information and requirements for all protection relays-Specification for contact performance
standard by BSI Group, 11/30/1982

BS 142-1-1.1:1982

Electrical protection relays. Information and requirements for all protection relays-Glossary of protection relay terms
standard by BSI Group, 11/30/1982

BS 1740-1:1971

Specification for wrought steel pipe fittings (screwed BS 21 R-series thread)-Metric units
standard by BSI Group, 06/28/1971